212141690 has 8 divisors (see below), whose sum is σ = 381855060. Its totient is φ = 84856672.

The previous prime is 212141663. The next prime is 212141693. The reversal of 212141690 is 96141212.

It can be written as a sum of positive squares in 2 ways, for example, as 207676921 + 4464769 = 14411^2 + 2113^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×212141690² = 90008193272112200, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (212141693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10607075 + ... + 10607094.

Almost surely, 2^212141690 is an apocalyptic number.

212141690 is a deficient number, since it is larger than the sum of its proper divisors (169713370).

212141690 is a wasteful number, since it uses less digits than its factorization.

212141690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21214176.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 212141690 is about 14565.0846204202. The cubic root of 212141690 is about 596.4060057336.

The spelling of 212141690 in words is "two hundred twelve million, one hundred forty-one thousand, six hundred ninety".